An axial flow fan

Abstract

The application relates to an axial flow fan, and relates to the technical field of axial flow fans. The axial flow fan comprises a machine body, a motor, blades and a cooling mechanism. The cooling mechanism comprises a support seat arranged on the machine body, a plurality of support balls rotatably arranged on the support seat and positioned on a motor output shaft, a cooling sponge arranged on the support seat, capable of absorbing cooling liquid and cooling the motor output shaft, and a liquid adding assembly arranged on the support seat and used for adding the cooling liquid to the cooling sponge. The motor output shaft is cooled by the cooling sponge which spreads the cooling liquid on the motor output shaft. The liquid adding assembly adds the cooling liquid to the cooling sponge, and the plurality of support balls support the motor output shaft, thereby reducing the risk of vibration and noise of the motor output shaft, making the axial flow fan stable in air outlet and capable of stable operation in a high-temperature state.

Description

Technical Field

[0001] This application relates to the technical field of axial flow fans, and in particular to an axial flow fan. Background Technology

[0002] An axial fan is a machine that rotates under the rotational force of an external drive source such as a motor and blows air in the axial direction. It is not only suitable for household appliances such as electric fans, air conditioners, and refrigerators, but also widely used in a variety of fields such as aerospace aircraft and engines.

[0003] Axial flow fans achieve air flow by driving blades to rotate through a motor. However, axial flow fans tend to overheat after prolonged operation, which can cause the motor output shaft to deform due to heat, thereby increasing the risk of vibration and noise from the axial flow fan. Summary of the Invention

[0004] To reduce the risk of vibration and noise from axial fans, this application provides an axial fan.

[0005] This application provides an axial flow fan, which adopts the following technical solution:

[0006] An axial flow fan includes a housing, a motor mounted on the housing, blades mounted on the motor output shaft, and a cooling mechanism mounted on the housing for cooling the motor output shaft. The cooling mechanism includes:

[0007] The support base is mounted on the machine body;

[0008] Multiple support balls are rotatably mounted on a support base and positioned on the motor output shaft;

[0009] A cooling sponge is placed on a support base and absorbs coolant. The motor output shaft is pressed against the cooling sponge, so that the coolant is applied to the motor output shaft for cooling.

[0010] A coolant filling assembly, mounted on a support base, is used to add coolant to a cooling sponge.

[0011] By adopting the above technical solution, the cooling sponge is pressed against the motor output shaft, and the cooling sponge applies coolant to the motor output shaft to cool it. As the motor output shaft rotates, the parts that are not in contact with the cooling sponge continue to come into contact with the cooling sponge for cooling. The liquid filling component adds coolant to the cooling sponge, and multiple support balls support the motor output shaft. Therefore, the combination of the support balls and the cooling sponge can greatly reduce the probability of the motor output shaft deforming due to heat, reduce the risk of vibration and noise from the motor output shaft, and make the axial fan output airflow stable and able to operate stably under high temperature conditions.

[0012] Meanwhile, the cooling sponge applies coolant to the motor output shaft, ensuring a moderate amount of coolant on the shaft. Compared to directly applying coolant to the output shaft, the cooling sponge significantly reduces coolant waste and leakage risks, saving coolant and minimizing environmental pollution from leaks. Furthermore, the cooling sponge has a simple and stable structure, and since it only contacts a portion of the motor output shaft when the motor is not running, coolant is only present at the contact points, further reducing coolant waste.

[0013] Optionally, the liquid dispensing assembly includes:

[0014] A liquid box, mounted on a support base and located below the motor output shaft, is filled with coolant.

[0015] Multiple capillary adsorption elements are set on the cooling sponge and extend downward into the liquid box. Under the action of capillary force, they adsorb and transport the coolant to the cooling sponge.

[0016] By adopting the above technical solution, the coolant in the liquid box is adsorbed and transported to the cooling sponge through multiple capillary adsorption components. The cooling sponge itself has a certain capillary force, which allows the transported coolant to continue to move and replenish within the cooling sponge, so that the coolant can be continuously applied to the motor output shaft.

[0017] As the coolant loss on the cooling sponge increases, multiple capillary adsorption elements accelerate the adsorption and delivery of coolant, ensuring that the cooling sponge retains sufficient coolant to cool the motor output shaft. Conversely, when there is more coolant in the cooling sponge, the capillary adsorption elements slow down the absorption and delivery of coolant, thus maintaining a good cooling effect on the motor output shaft. This reduces the risk of motor vibration and noise while also reducing coolant waste.

[0018] Meanwhile, the liquid box is located below the motor output shaft. Multiple capillary adsorption elements draw the coolant upwards and deliver it to the cooling sponge. Compared to adding the coolant downwards to the motor output shaft under gravity, this application reduces the risk of coolant leakage downwards. If a pump is used, the cost and energy efficiency of the fan will be increased. Therefore, this application can cool the motor output shaft while reducing the risk of coolant leakage, fan cost, and energy consumption.

[0019] Optionally, the support base is provided with a mounting assembly, and the upper surface of the liquid box is provided with a plurality of sliding holes spaced apart. The mounting assembly includes:

[0020] The mounting plate is vertically slidably mounted on the sliding hole through multiple guide tubes, and multiple capillary adsorption elements are snapped onto the inner sidewalls of the multiple guide tubes, so that the cooling sponge is pressed against the mounting plate for positioning and extends downward into the coolant in the liquid box.

[0021] The elastic element is set on the support base and connected to the mounting plate, and pushes the cooling sponge against the motor output shaft.

[0022] By adopting the above technical solution, the elastic element can push the mounting plate closer to the motor output shaft, thereby bringing the cooling sponge closer to and pressing against the motor output shaft, thus further improving the cooling effect on the motor output shaft and reducing the risk of motor vibration and noise. At the same time, multiple capillary adsorption elements can be respectively snapped onto multiple guide tubes, allowing the multiple capillary adsorption elements to extend downward into the coolant in the liquid box, while the cooling sponge presses against the mounting plate, thereby realizing the replacement of the cooling sponge and capillary adsorption elements. Therefore, the combination of the mounting plate and the elastic element can further reduce the risk of motor vibration and noise, while also enabling the replacement of the cooling sponge and capillary adsorption elements.

[0023] Because the cooling sponge and capillary suction components are made of soft materials, they will deform under pressure, making it difficult for them to move vertically. The mounting plate and multiple guide tubes enable the installation of the cooling sponge and multiple capillary suction components and allow them to move vertically, thereby further reducing the risk of motor vibration and noise.

[0024] Optionally, the support base can be detachably installed on the machine body, and a plurality of the support balls are located around the cooling sponge.

[0025] By adopting the above technical solution, the installation and replacement of the cooling mechanism can be realized. At the same time, multiple support balls can be evenly supported on the motor output shaft located around the cooling sponge, making the support force of the motor output shaft on the cooling sponge more uniform, reducing the risk of local deformation of the cooling sponge, and further reducing the risk of motor vibration and noise.

[0026] Optionally, an installation tube is provided on the upper surface of the liquid box, and the installation plate and cooling sponge are vertically slidably disposed on the inner wall of the installation tube, such that multiple sliding holes are located inside the installation tube.

[0027] By adopting the above technical solution, the mounting tube can guide the movement of the mounting plate and the cooling sponge, improving the stability of both during movement. At the same time, the mounting tube can cover multiple sliding holes, so when coolant leaks at the sliding holes, it will enter the mounting tube and then continue to move to the cooling sponge to be absorbed, further reducing the risk of coolant leakage.

[0028] Optionally, the machine body is provided with a mounting plate, the motor is mounted on the side wall of the mounting plate away from the cooling mechanism and the output shaft passes through the mounting plate near the cooling mechanism, and the mounting plate is provided with a liquid replenishment assembly connected to the liquid box, the liquid replenishment assembly including:

[0029] A coolant replenishing ring is mounted on the mounting plate, with the motor output shaft coaxially passing through the coolant replenishing ring and located on the side of the cooling sponge closer to the motor. The mounting plate has multiple ventilation holes inclined towards the motor. The coolant replenishing ring has a coolant replenishing chamber filled with coolant. The mounting plate has multiple ventilation holes inclined towards the motor. The side wall of the coolant replenishing ring near the blade has multiple cooling holes that allow air to pass through for cooling and are connected to the ventilation holes.

[0030] The replenishment tube is installed on the replenishment ring and connects the replenishment chamber and the liquid box.

[0031] By adopting the above technical solution, the motor is fixedly mounted on the mounting plate and the output shaft passes through the mounting plate. At the same time, the motor output shaft coaxially passes through the replenishing ring. When the motor starts, air passes through the cooling holes, and the coolant can cool the passing air. The cooled air then passes through the ventilation holes to cool the motor. The coolant can also be connected to the liquid box through the replenishing pipe. When the coolant in the liquid box is insufficient, it can be replenished. Alternatively, when the coolant in the replenishing ring is insufficient, the liquid box can also be replenished, so that the coolant in the replenishing chamber and the liquid box is balanced. This enables simultaneous cooling of the motor and the output shaft, thereby further reducing the risk of motor vibration and noise.

[0032] Optionally, the replenishing ring is provided with a guide ring for directing air to the cooling hole.

[0033] By adopting the above technical solution, more air can pass through the cooling holes, thereby further improving the cooling effect on the motor and further reducing the risk of motor vibration and noise.

[0034] Optionally, the body is provided with a noise reduction component for noise reduction, the noise reduction component including:

[0035] The mounting part is set on the outer wall of the machine body and forms a noise reduction cavity with one end open with the outer wall of the machine body. Multiple noise reduction holes communicating with the noise reduction cavity are opened on the inner wall of the machine body.

[0036] Mounting ring, which is detachably mounted on the mounting part and the body and is used to seal the opening of the noise reduction cavity;

[0037] The sound-absorbing cotton is mounted on the mounting ring via a connecting assembly and extends into the noise reduction cavity to eliminate noise passing through the noise reduction holes.

[0038] By adopting the above technical solution, the noise generated by the motor during operation can be eliminated by moving it to the sound-absorbing cotton through the noise reduction hole, thereby reducing the risk of motor noise. At the same time, the sound-absorbing cotton can be replaced after removing the mounting ring, thereby further reducing the risk of motor noise.

[0039] Optionally, the connection component includes:

[0040] Multiple connecting plates are spaced apart on the mounting ring and extend into the noise reduction cavity;

[0041] Two snap-fit ​​rings are located on the end of the mounting ring and multiple connecting plates away from the mounting ring, and snap-fit ​​grooves are opened on the opposite side walls for the sound-absorbing cotton to snap and position.

[0042] By adopting the above technical solution, the two ends of the sound-absorbing cotton are snapped into the snap-fit ​​grooves of the two snap-fit ​​rings, and then the snap-fit ​​rings are snapped into the noise reduction cavity. The mounting ring is then fixedly installed on the machine body and the mounting part, thereby realizing the installation of the sound-absorbing cotton and further reducing the risk of motor noise.

[0043] Optionally, the snap-fit ​​groove is provided with a guide angle to facilitate the snap-fit ​​of the sound-absorbing cotton.

[0044] By adopting the above technical solution, it is easy to install sound-absorbing cotton.

[0045] In summary, this application includes at least one of the following beneficial technical effects:

[0046] 1. Cooling is achieved by applying coolant to the motor output shaft through a cooling sponge, and the coolant filling component adds coolant to the cooling sponge. At the same time, multiple support balls support the motor output shaft. Therefore, the combination of support balls and cooling sponge can greatly reduce the probability of the motor output shaft deforming due to heat, reduce the risk of vibration and noise from the motor output shaft, and make the axial fan output air stable and able to operate under high temperature conditions.

[0047] 2. Applying coolant to the motor output shaft using a cooling sponge ensures a moderate amount of coolant on the shaft. Compared to directly applying coolant to the output shaft, the cooling sponge significantly reduces coolant waste and leakage risks, conserving coolant and minimizing environmental pollution from leaks. Furthermore, the cooling sponge has a simple and stable structure, and since it only contacts a portion of the motor output shaft when the motor is not running, coolant is only present at the contact point between the sponge and the shaft, further reducing coolant waste. Attached Figure Description

[0048] Figure 1 This is a three-dimensional structural diagram of an axial fan;

[0049] Figure 2 This is a partial structural diagram of an axial fan;

[0050] Figure 3 yes Figure 2 A cross-sectional schematic diagram of AA in the middle;

[0051] Figure 4 This is a partial exploded view of an axial fan, mainly showing the liquid filling assembly and the mounting assembly.

[0052] Figure 5 This is a partial exploded view of an axial fan, mainly showing the noise reduction components and connection components.

[0053] Reference numerals: 1. Body; 11. Motor; 12. Blade; 13. Mounting plate; 14. Support rod; 15. Mounting tube; 16. Support surface; 2. Cooling mechanism; 21. Support base; 22. Support ball; 23. Cooling sponge; 24. Cooling surface; 3. Liquid filling assembly; 31. Liquid box; 32. Capillary adsorption component; 33. Sliding hole; 4. Mounting assembly; 41. Mounting plate; 42. Elastic component; 43. Guide tube; 5. Liquid replenishment assembly; 51. Liquid replenishment ring; 52. Liquid replenishment tube; 53. Ventilation hole; 54. Cooling hole; 55. Guide ring; 56. Liquid replenishment chamber; 6. Noise reduction assembly; 61. Mounting part; 62. Mounting ring; 63. Sound-absorbing cotton; 64. Noise reduction chamber; 65. Noise reduction hole; 7. Connecting assembly; 71. Connecting plate; 72. Snap-fit ​​ring; 73. Snap-fit ​​groove. Detailed Implementation

[0054] The following provides a further detailed description of this application.

[0055] This application discloses an axial flow fan.

[0056] Reference Figure 1 and Figure 2 The axial fan includes a body 1, a motor 11 mounted on the body 1, blades 12 mounted on the output shaft of the motor 11, a cooling mechanism 2 mounted on the body 1 for cooling the output shaft of the motor 11, and a noise reduction component 6 for reducing noise.

[0057] The body 1 has a cylindrical structure. A mounting plate 13 is fixedly installed on the inner wall of the body 1 by multiple support rods 14. The mounting plate 13 has a ring structure and is coaxial with the body 1. Multiple support rods 14 are fixedly installed on the outer wall of the mounting plate 13 and arranged in a circular array around the axis of the body 1. The support rods 14 are arranged radially along the body 1 and fixedly installed on the inner wall of the body 1.

[0058] The cooling mechanism 2 includes a support base 21 and a cooling sponge 23. The support base 21 is fixedly installed on the inner side wall of the body 1, and the support base 21 is horizontal and located on one side of the mounting plate 13. The motor 11 is fixedly installed on the side wall of the mounting plate 13 away from the support base 21, and the output shaft of the motor 11 coaxially passes through the mounting plate 13 and extends to the side of the mounting plate 13 near the support base 21.

[0059] Reference Figures 2-4 Cooling sponge 23 is placed on the upper surface of support base 21, and coolant is absorbed inside cooling sponge 23. At the same time, an arc-shaped cooling surface 24 is formed on the upper surface of cooling sponge 23. Cooling surface 24 presses against the output shaft of motor 11, so that the coolant inside cooling sponge 23 is coated on the output shaft of motor 11 to achieve cooling.

[0060] The cooling mechanism 2 also includes multiple support balls 22 and a liquid adding component 3. The liquid adding component 3 is disposed on the support base 21 and is used to add coolant to the cooling sponge 23. The liquid adding component 3 includes a liquid box 31 and multiple capillary adsorption elements 32. The liquid box 31 is fixedly installed on the upper surface of the support base 21 and contains coolant for cooling. At the same time, multiple vertical sliding holes 33 are spaced apart on the upper surface of the liquid box 31.

[0061] Multiple capillary adsorption elements 32 are disposed on the lower surface of the cooling sponge 23, and the capillary adsorption elements 32 extend downward into the liquid box 31 and into the liquid. Under the action of capillary force, the capillary adsorption elements 32 can adsorb and transport the coolant to the cooling sponge 23. The capillary adsorption elements 32 can be absorbent cotton sheets, etc. The cooling sponge 23 can also form a certain adsorption force, so that the coolant is adsorbed in the cooling sponge 23. When the coolant located at the cooling surface 24 is applied to the output shaft of the motor 11, the coolant at other positions on the cooling sponge 23 can move towards the cooling surface 24 to replenish it.

[0062] The support base 21 is provided with an installation assembly 4 that is connected to the cooling sponge 23 and multiple capillary adsorption components 32. An installation tube 15 is fixedly installed on the upper surface of the liquid box 31 and below the output shaft of the motor 11. Multiple sliding holes 33 are located inside the installation tube 15. The installation tube 15 is set vertically upward and the projection of the inner sidewall in the vertical direction is square or rectangular. An arc-shaped support surface 16 is formed at the top of the installation tube 15, and the center of the support surface 16 is located on the axis of the output shaft of the motor 11. Multiple support balls 22 are rotatably installed on the support surface 16 and supported on the output shaft of the motor 11 for support and positioning.

[0063] Reference Figures 2-4The mounting assembly 4 includes a mounting plate 41 and an elastic element 42. The mounting plate 41 is vertically slidably mounted on the inner wall of the mounting tube 15. Guide tubes 43 are fixedly mounted on the lower surface of the mounting plate 41 at positions corresponding to multiple sliding holes 33. The multiple guide tubes 43 are vertical and are vertically slidably mounted on the multiple sliding holes 33. The guide tubes 43 are connected to the upper surface of the mounting plate 41. Multiple capillary adsorption elements 32 are respectively snapped onto the inner wall of the multiple guide tubes 43, and the capillary adsorption elements 32 extend vertically downward into the liquid located in the liquid box 31, while causing the cooling sponge 23 to press against the upper surface of the mounting plate 41, so that the mounting plate 41 and the cooling sponge 23 move vertically. The elastic element 42 is a spring or sheet spring. The elastic element 42 is fixedly mounted on the lower surface of the mounting plate 41. The elastic element 42 pushes the cooling surface 24 on the cooling sponge 23 to press against the output shaft of the motor 11.

[0064] The output shaft of motor 11 drives blade 12 to rotate. The cooling surface 24 on the cooling sponge 23 is pressed against the output shaft of motor 11 by the action of the elastic sheet, thereby applying coolant to the output shaft of motor 11 for cooling. As the output shaft of motor 11 rotates, the coolant continues to be applied to other positions on the output shaft of motor 11, thereby achieving cooling of the output shaft of motor 11. Multiple support balls 22 support and position the output shaft of motor 11. At the same time, multiple capillary adsorption elements 32 adsorb and transport the coolant to the cooling sponge 23. After the coolant at the cooling surface 24 is applied to the output shaft of motor 11, the coolant at other positions on the cooling sponge 23 is replenished to the cooling surface 24, thereby continuing to apply coolant to the output shaft of motor 11, thereby reducing the risk of deformation of the output shaft of motor 11 and reducing the risk of vibration and noise of motor 11.

[0065] A liquid replenishment assembly 5 connected to the liquid box 31 is provided on the side wall of the mounting plate 13 near the support base 21. The liquid replenishment assembly 5 includes a liquid replenishment ring 51 and a liquid replenishment tube 52. The liquid replenishment ring 51 is fixedly installed on the side wall of the mounting plate 13 near the support base 21 and is coaxially arranged with the mounting plate 13. The output shaft of the motor 11 passes through the liquid replenishment ring 51 coaxially. The outer side wall of the liquid replenishment ring 51 extends to the outside of the motor 11. Multiple ventilation holes 53 inclined towards the motor 11 are opened on the mounting ring 62 and located outside the motor 11. Multiple cooling holes 54 communicating with the ventilation holes 53 are opened on the side wall of the liquid replenishment ring 51 away from the mounting plate 13. A liquid replenishment chamber 56 is opened in the liquid replenishment ring 51 and is filled with coolant.

[0066] The replenishment pipe 52 is fixedly installed at the bottom of the replenishment ring 51 and fixedly connected to the side wall of the liquid box 31. The replenishment pipe 52 connects the replenishment chamber 56 and the liquid box 31. When the coolant in the liquid box 31 is low, the coolant in the replenishment chamber 56 can flow into the liquid box 31 through the replenishment pipe 52 to replenish it. Conversely, when the coolant in the replenishment chamber 56 is low, the coolant in the liquid box 56 can also flow into the replenishment chamber 56 to replenish it. A guide ring 55 is coaxially fixedly installed on the side wall of the replenishment ring 51 near the support base 21. The diameter of the guide ring 55 at the end near the support base 21 is larger than the diameter at the end near the replenishment ring 51. The guide ring 55 is used to guide air to the cooling hole 54.

[0067] When the motor 11 starts, it drives the blades 12 to rotate, causing air to pass through the cooling hole 54. The coolant in the liquid replenishment chamber 56 cools the air, and then the cooled air is blown towards the motor 11 through the ventilation hole 53, thereby cooling the motor 11 and further reducing the risk of vibration and noise in the motor 11.

[0068] Reference Figure 1 , Figure 5 The noise reduction component 6 includes a mounting part 61, a mounting ring 62, and sound-absorbing cotton 63. The mounting part 61 is coaxially fixedly mounted on the outer wall of one end of the body 1, and the mounting part 61 extends to the other end of the body 1 to form a noise reduction cavity 64 with one open end between it and the outer wall of the body 1. A plurality of noise reduction holes 65 communicating with the noise reduction cavity 64 are evenly opened on the inner wall of the body 1. The mounting ring 62 is fixedly mounted on the mounting part 61 and the end of the body 1 near the opening of the noise reduction cavity 64 by screws, and the mounting ring 62 is used to block the open end of the noise reduction cavity 64. The sound-absorbing cotton 63 is set on the mounting ring 62 through the connecting component 7, and the sound-absorbing cotton 63 extends into the noise reduction cavity 64 and is used to eliminate noise passing through the noise reduction holes 65.

[0069] The connecting assembly 7 includes multiple connecting plates 71 and two snap-fit ​​rings 72. The connecting plates 71 are arranged along the axis of the body 1, and the multiple connecting plates 71 are arranged in a circumferential array around the axis of the body 1. The connecting plates 71 are fixedly installed on the side wall of the mounting ring 62 near the noise reduction cavity 64, and the connecting plates 71 extend into the noise reduction cavity 64. One snap-fit ​​ring 72 is fixedly installed on the side wall of the mounting ring 62 near the noise reduction cavity 64, and the other snap-fit ​​ring 72 is fixedly installed on the end of the multiple connecting plates 71 away from the mounting ring 62. The two snap-fit ​​rings 72 have annular snap-fit ​​grooves 73 on their opposite side walls, and the snap-fit ​​grooves 73 and the noise reduction cavity 64 have their axes coincident. The sound-absorbing cotton 63 has a plate-like structure and is rolled into a cylindrical structure. The two ends of the sound-absorbing cotton 63 are snapped into the snap-fit ​​grooves 73 of the two snap-fit ​​rings 72, thereby realizing the installation of the sound-absorbing cotton 63. The snap-fit ​​grooves 73 have guide angles to facilitate the snap-fit ​​installation of the sound-absorbing cotton 63 into the snap-fit ​​grooves 73.

[0070] The working principle of this application embodiment is as follows:

[0071] The output shaft of motor 11 drives the blades 12 to rotate. The cooling sponge 23, under the action of the elastic sheet, presses against the output shaft of motor 11, thereby applying coolant to the output shaft of motor 11 for cooling. As the output shaft of motor 11 rotates, the coolant continues to be applied to other parts of the output shaft of motor 11, thus achieving cooling of the output shaft of motor 11. Multiple support balls 22 support and position the output shaft of motor 11. At the same time, multiple capillary adsorption elements 32 adsorb and transport the coolant to the cooling sponge 23, thereby reducing the risk of deformation of the output shaft of motor 11 and reducing the risk of vibration and noise from motor 11.

[0072] When the motor 11 starts, it drives the blades 12 to rotate. Air is cooled when it passes through the cooling hole 54. Then, the cooled air is blown towards the motor 11 through the ventilation hole 53, thereby cooling the motor 11 body 1. At the same time, the output of cooled air reduces the risk of vibration and noise in the motor 11, making the axial fan output stable and able to operate at high temperatures.

[0073] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An axial flow fan, characterized in that: The system includes a body (1), a motor (11) mounted on the body (1), and blades (12) mounted on the output shaft of the motor (11). It also includes a cooling mechanism (2) mounted on the body (1) for cooling the output shaft of the motor (11). The cooling mechanism (2) includes: Support base (21) is mounted on the body (1); Multiple support balls (22) are rotatably mounted on the support base (21) and positioned on the output shaft of the motor (11); Cooling sponge (23) is placed on support base (21) and absorbs coolant. The output shaft of motor (11) is pressed against cooling sponge (23) so that coolant is applied to the output shaft of motor (11) for cooling. A liquid adding assembly (3) is provided on a support base (21) and is used to add coolant to a cooling sponge (23); The liquid addition assembly (3) includes: A liquid box (31) is mounted on a support base (21) and located below the output shaft of the motor (11) and is filled with coolant; Multiple capillary adsorption elements (32) are set on the cooling sponge (23) and extend downward into the liquid box (31), and under the action of capillary force, adsorb and transport the coolant to the cooling sponge (23); The support base (21) is provided with an installation component (4), and the upper surface of the liquid box (31) is provided with a plurality of sliding holes (33) spaced apart. The installation component (4) includes: The mounting plate (41) is vertically slidably mounted on the sliding hole (33) via multiple guide tubes (43), and multiple capillary adsorption elements (32) are snapped onto the inner sidewall of multiple guide tubes (43) so that the cooling sponge (23) is pressed against the mounting plate (41) for positioning and extends downward into the coolant in the liquid box (31); The elastic element (42) is set on the support base (21) and connected to the mounting plate (41) to push the cooling sponge (23) against the output shaft of the motor (11).

2. An axial flow fan according to claim 1, characterized in that: The support base (21) is detachably mounted on the body (1), and a plurality of the support balls (22) are located around the cooling sponge (23).

3. An axial flow fan according to claim 1, characterized in that: The liquid box (31) has an installation tube (15) on its upper surface. The installation plate (41) and the cooling sponge (23) are vertically slidably disposed on the inner wall of the installation tube (15) such that multiple sliding holes (33) are located inside the installation tube (15).

4. An axial flow fan according to claim 3, characterized in that: The body (1) is provided with a mounting plate (13), the motor (11) is provided on the side wall of the mounting plate (13) away from the cooling mechanism (2) and the output shaft passes through the mounting plate (13) and is close to the cooling mechanism (2). The mounting plate (13) is provided with a liquid replenishment component (5) connected to the liquid box (31). The liquid replenishment component (5) includes: A coolant ring (51) is provided on the mounting plate (41) such that the output shaft of the motor (11) passes through the coolant ring (51) coaxially and is located on the side of the cooling sponge (23) near the motor (11). The mounting plate (13) has multiple ventilation holes (53) inclined towards the motor (11). The coolant ring (51) has a coolant cavity (56) filled with coolant. The mounting plate (41) has multiple ventilation holes (53) inclined towards the motor (11). The side wall of the coolant ring (51) near the blade (12) has multiple cooling holes (54) for air to pass through for cooling and connected to the ventilation holes (53). The replenishment tube (52) is set on the replenishment ring (51) and connects the replenishment chamber (56) and the liquid box (31).

5. An axial flow fan according to claim 4, characterized in that: The replenishing ring (51) is provided with a guide ring (55) for guiding air to the cooling hole (54).

6. An axial flow fan according to claim 1, characterized in that: The body (1) is provided with a noise reduction component (6) for noise reduction, the noise reduction component (6) including: The mounting part (61) is provided on the outer wall of the body (1) and forms a noise reduction cavity (64) with an opening at one end with the outer wall of the body (1). Multiple noise reduction holes (65) communicating with the noise reduction cavity (64) are provided on the inner wall of the body (1). Mounting ring (62) is detachably mounted on mounting part (61) and body (1) and is used to block the opening of noise reduction cavity (64); The sound-absorbing cotton (63) is mounted on the mounting ring (62) via the connecting assembly (7) and extends into the noise reduction cavity (64) to eliminate noise passing through the noise reduction hole (65).

7. An axial flow fan according to claim 6, characterized in that: The connection component (7) includes: Multiple connecting plates (71) are spaced apart on the mounting ring (62) and extend into the noise reduction cavity (64); Two snap-fit ​​rings (72) are set on the end of the mounting ring (62) and multiple connecting plates (71) away from the mounting ring (62) and snap-fit ​​grooves (73) are opened on the opposite side walls for the sound-absorbing cotton (63) to snap and position.

8. An axial flow fan according to claim 7, characterized in that: The snap-fit ​​groove (73) is provided with a guide angle to facilitate the snap-fit ​​of the sound-absorbing cotton (63).

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